Hawley, Jamie, Jeremy G. Powell, Elizabeth B. Kegley, and Paul A. Beck. 2016. “Comparison of Ceftiofur Crystalline Free Acid to Tilmicosin for Metaphylactic Treatment of Calves at Risk for Bovine Respiratory Disease”. The Bovine Practitioner 50 (1):33-39. https://doi.org/10.21423/bovine-vol50no1p33-39.